Common venting systems may be too large when an existing unit is removed. At the time of removal of an existing appliance, the following steps must be followed with each appliance remaining connected to the common venting system placed in operation, while the other appliances remaining connected to the common venting system are not in operation.

a)Seal any unused opening in the common venting system.

b)Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or restriction, leakage, corrosion or other unsafe condition.

c)Insofar as is practical, close all building doors and windows and all doors between the space in which the appliances remaining connected to the common venting system are located and other spaces of the building. Turn on clothes dryers and any appliance not connected to the common vent system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate summer exhaust fan. Close fireplace dampers.

d)Place in operation the appliances being inspected. Follow the manufacturers instructions for lighting each appli- ance. Adjust thermostat so appliance will operate continuously.

e)Test for spillage at the drafthood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle, or smoke from a cigarette, cigar or pipe, toilet paper trick. For the Hi Delta, check the pressure at a pressure tap located 12 in. above the bottom joint of the first vertical vent pipe. Pressure should be anywhere between -.01 to -.08 inch W.C.

f)After it has been determined that each appliance remaining connected to the common venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and other gas burning appliances to their previous conditions of use.

g)Any improper operation of the common venting system should be corrected so that the installation conforms with the latest edition of the NFGC (US) and the B 149.1 and .2 Installation Code (Canada). When re-sizing any portion of the common venting system, the common venting system should be re-sized to approach the minimum size as determined using the appropriate tables in Appendix G in the NFGC (US) and Appendix B of the B 149 Installation Code (Canada).

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Raypak 122-322 installation instructions
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122-322 specifications

Raypak 122-322 is a cutting-edge pool and spa heater designed for optimal performance and efficiency. Known for its robust construction and reliable heating capabilities, this heater has become a preferred choice among pool owners.

One of the standout features of the Raypak 122-322 is its advanced copper fin tube heat exchanger. This innovative technology enhances the heater's efficiency by maximizing heat transfer while minimizing energy consumption. By efficiently circulating the water through the heat exchanger, the Raypak 122-322 quickly raises the temperature, allowing for an enjoyable swimming experience regardless of the weather.

The heater is equipped with a digital control system that allows for precise temperature adjustments. This user-friendly interface makes it easy to set and maintain the desired water temperature, promoting user convenience. The digital controls also provide diagnostic features, which simplify troubleshooting and maintenance, ensuring the heater operates smoothly for years to come.

Safety is a crucial aspect of the Raypak 122-322. It comes with a series of safety features, including a flame rollout switch, high limit switch, and a pressure switch that ensures the unit operates safely under various conditions. This focus on safety provides peace of mind for users, knowing that their heating system is designed with protective measures in place.

The Raypak 122-322 is environmentally friendly, designed to use less energy compared to conventional heating systems. Its efficient performance not only reduces operational costs but also lessens the overall environmental impact, making it a responsible choice for conscious consumers.

With a compact design, the Raypak 122-322 can fit easily into various installation spaces, making it versatile for numerous residential or commercial settings. Additionally, the unit is built with durable materials resistant to corrosion and weather conditions, ensuring longevity and minimal maintenance requirements.

Overall, the Raypak 122-322 stands out in the market due to its advanced features, safety mechanisms, energy efficiency, and ease of use. It exemplifies a perfect blend of innovation and reliability, making it an exceptional option for anyone looking to enhance their pool or spa experience.
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